Merck & Co., Inc.’s Rally Could Burn Investors

The New Year has been good to Merck & Co., Inc. (NYSE:MRK), as shares of the global giant rallied to their best level since October on the back of positive headlines this week.Merck’s wild ride began in October, when the company reported earnings and missed revenue projections by 2%.Management pulling a European marketing application for its key drug Keytruda also added to the selling.